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Agreed. And the Red Sea tests that I use for alk are easy to use at a cheap cost in the bundle. Only reason why I have a ULR Phosphate checker from Hanna is because most of the other phosphate checkers are bad when you’re in need of accurate numbers for phosphate especially.The ULR phosphorous is good. The alkalinity checker has a good reputation, but I find that Salifert is just as good and is less expensive.

